Provided is a display apparatus including: a light emitting unit having a light source; a display unit configured to display an image by controlling a transmittance of light from the light emitting unit; first and second sensors provided in the light emitting unit to detect a brightness of the light source; and a control unit configured to control a transmittance of the display unit on the basis of detection values from the first and second sensors. A distance from the light source to the second sensor is longer than a distance from the light source to the first sensor. The control unit controls the transmittance of the display unit on the basis of a change degree of the detection value from the first sensor during a given period and a change degree of the detection value from the second sensor during the period.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display apparatus, comprising: a light source; a display panel that displays an image by controlling a transmittance of light from the light source; a first sensor that detects a brightness of the light source; a second sensor that detects a brightness of the light source, a distance from the light source to the second sensor being longer than a distance from the light source to the first sensor; a memory that stores correspondence information indicating a predetermined correspondence relationship of a difference between a first change degree of a detection value from the first sensor and a second change degree of a detection value from the second sensor with a change in a brightness distribution or a color distribution in the display sand due to the light from the light source; and a controller configured to control a transmittance of the display panel, wherein the controller performs: acquiring the change in the brightness distribution or the color distribution in the display panel due to light from the light source during a period on the basis of the first change degree during the period, the second change degree during the period aid the correspondence information stored in the memory; and controlling the transmittance of the display panel on the basis of the change in the brightness distribution or the color distribution during the period.
The display apparatus uses a light source and a display panel that controls light transmittance to show images. Two sensors, one near (first) and one farther (second) from the light source, measure its brightness. The system stores a lookup table linking the *difference* in how the light source brightness *changes* (over time) at each sensor to brightness or color variations on the display. A controller uses the sensors' change readings, this lookup table, and adjusts the display panel's transmittance to correct uneven brightness or color. This actively compensates for light source aging or inconsistencies.
2. The display apparatus according to claim 1 , wherein the correspondence information indicates a predetermined correspondence relationship between the difference and a change the brightness distribution in the display panel due to the light from the light source, and the controller performs: acquiring the change in the brightness distribution in the display panel due to light from the light source during the period on the basis of the first change degree during the period, the second change degree during the period and the correspondence information; and controlling the transmittance of the display panel so as to compensate for the change in the brightness distribution.
The display apparatus described focuses on correcting brightness variations. The lookup table specifically connects the difference in brightness change detected by the two sensors (one near, one far from the light source) to brightness distribution changes on the display panel. The controller uses this information to adjust the display panel's transmittance, aiming to compensate for uneven brightness across the screen, ensuring a uniform image.
3. The display apparatus according to claim 1 , wherein the controller performs controlling an amount of the light emitted from front the light source so as to compensate for the change in the brightness distribution or the color distribution.
This display apparatus dynamically adjusts the *light source output* to compensate for brightness or color variations. It uses a light source, a display panel, and two brightness sensors placed at different distances from the light source. A controller monitors the brightness changes reported by the sensors and adjusts the light source intensity to counteract any detected unevenness in brightness or color distribution on the display panel, ensuring image uniformity.
4. The display apparatus according to claim 1 , wherein the correspondence information indicates a predetermined correspondence relationship between the difference and a change in the color distribution in the display panel due to the light from the light source, and the controller performs: acquiring the change in the color distribution in the display panel due to light from the light source during the period on the basis of the first change degree during the period, the second change degree during the period and the correspondence information; and controlling the transmittance of the display panel so as to compensate for the change in the color distribution.
This display apparatus is designed to correct color variations on the display panel. The lookup table contains a mapping between the difference in brightness change detected by two sensors (one near, one far from the light source) and changes in color distribution on the display. The controller uses this information to modify the display panel's transmittance, specifically to counteract color imbalances and improve color uniformity.
5. The display apparatus according to claim 1 , further comprising: a plurality of optical sensors including the first and second sensors, wherein the first sensor is the optical sensor at a position closest to the light source among the plurality of optical sensors.
The display apparatus uses a light source, a display panel, and multiple brightness sensors including the first and second sensors, with the first sensor is closest to the light source. A controller monitors the brightness changes reported by the sensors and adjust the light source intensity to counteract any detected unevenness in brightness or color distribution on the display panel, ensuring image uniformity.
6. The display apparatus according to claim 1 , further comprising: a plurality of optical sensors including the first and second sensors, wherein the second sensor is the optical sensor at a position most distant from the light source among the plurality of optical sensors.
The display apparatus uses a light source, a display panel, and multiple brightness sensors including the first and second sensors, with the second sensor located furthest from the light source. A controller monitors the brightness changes reported by the sensors and adjust the light source intensity to counteract any detected unevenness in brightness or color distribution on the display panel, ensuring image uniformity.
7. The display apparatus according to claim 1 , wherein the second sensor consists of a plurality of optical sensors at approximately equal distances from the light source, and each of respective distances from the light source to the respective optical sensors is longer than a distance from the light source to the first sensor, and the controller acquires, as the detection value from the second sensor, a sum of detection values from the plurality of optical sensors.
The display apparatus uses a light source, a display panel, a first brightness sensor near the light source, and a group of brightness sensors at approximately equal distances further away from the light source. The controller calculates the brightness value of the second sensor by summing the individual readings of each of the optical sensors in that group before using that value to correct for color and brightness.
8. The display apparatus according to claim 1 , further comprising a plurality of the light sources, wherein the controller performs acquiring the detection value from the first sensor and the detection value from the second sensor in a state where one of the plurality of light sources has been turned on and other light sources of the plurality of light sources have been turned off.
The display apparatus uses multiple light sources, a display panel, and two brightness sensors to measure their individual performance. The controller measures the brightness reported from the two sensors for each light source when only that light source is active. This allows the system to characterize each light source's light degradation over time using both brightness sensors.
9. The display apparatus according to claim 8 , wherein the one of the plurality of light sources is located at a position corresponding to a center portion of the display panel.
In the multi-light source display described, the light source that is measured for individual degradation, as described in the previous claim, is the one at the center of the display. This helps ensure the center portion of the display that receives the most viewer attention maintains appropriate colors and brightness.
10. The display apparatus according to claim 1 , wherein the first change degree is a decrease rate of the detection value from the first sensor and the second change degree is a decrease rate of the detection value from the second sensor.
In the display apparatus, the rate of brightness change is measured by how much the brightness *decreases* over time. Thus the system uses the *decrease rate* reported by the two brightness sensors, one near and one far, to adjust the display panel and compensate for light source degradation that might cause uneven brightness or color on the display panel.
11. A display apparatus, comprising: a light source; a display panel that displays an image by controlling a transmittance of light from the light source; a first sensor that detects a brightness of the light source; a second sensor that detects a brightness of the light source, the second sensor consisting of a plurality of optical sensors at different distances from the light source, and each of respective distances from the light source to the respective optical sensors being longer than a distance from the light source to the first sensor, a memory that stores change degree information indicating respective predetermined change degrees of detection values from the respective optical sensors of the second sensor; and a controller that controls a transmittance of the display panel wherein the controller performs: acquiring the change degree of the detection value from any of the plurality of optical sensors during a period, correcting the change degree on the basis of the change degree information, and controlling the transmittance of the display panel on the basis of a difference between the corrected change degree and a change degree of a detection value from the first sensor during the period.
The display apparatus uses a light source, display panel, a first brightness sensor, and a group of brightness sensors at varying distances (all further than the first sensor) from the light source. The controller uses pre-stored data about the relative brightness reported from each sensor in the group to correct the brightness reading from whichever sensor is reporting. Then the system uses the difference between this corrected value and the reading from the first sensor to adjust display transmittance.
12. A method of controlling a display apparatus including: a light source; a display panel that displays an image by controlling a transmittance of light from the light source; a first sensor that detects a brightness of the light source; and a second sensor that detects a brightness of the light source, a distance from the light source to the second sensor being longer than a distance from the light source to the first sensor, the method comprising: acquiring correspondence information indicating a predetermined correspondence relationship of a difference between a first change degree of a detection value from the first sensor and a second change degree of a detection value from the second sensor with a change in a brightness distribution or a color distribution in the display panel due to the light from the light source; acquiring the change in the brightness distribution or the color distribution in the display panel due to the light from the light source during a period on the basis of the first change degree during the period, the second change degree during the period and the correspondence information stored in the memory; and controlling the transmittance of the display panel on the basis of the change in the brightness distribution or the color distribution during the period.
A method for controlling a display: This method uses a light source and a display panel, with two sensors measuring light source brightness at different distances. It involves using a lookup table linking differences in how brightness changes at each sensor to uneven brightness or color on the display. The method uses the sensor change readings and the lookup table to determine brightness or color variations and then adjusts the display panel's transmittance to fix them, thereby correcting for light source inconsistencies.
13. A display apparatus, comprising: a light source configured to emit light in a front direction; an optical member configured to diffuse a part of the light from the light source in a direction perpendicular to the front direction; a display panel configured to display an image by transmitting the light from the light source; a first sensor provided in neighbor of the light source to detect a brightness of the light source; a second sensor to detect a brightness of the light source, a distance from the light source to the second sensor being longer than a distance from the light source to the first sensor; and a controller configured to control a transmittance of the display panel, wherein the controller performs acquiring a degree of a degradation of the optical member on the basis of a detection value of the first sensor and a detection value of the second sensor, and controlling the transmittance of the display panel on the basis of the degree of the degradation of the optical member.
The display apparatus utilizes a light source that sends light forward and an optical diffuser to spread some light sideways, a display panel, and two sensors (one near, one far from the light source) measuring its brightness. The controller determines the amount the optical diffuser has degraded, using the sensor readings. It then adjusts the display panel's transmittance to compensate for the degradation of the optical member.
14. A method of controlling a display apparatus including: a light source; a display panel that displays an image by controlling a transmittance of light from the light source; a first sensor that detects a brightness of the light source; and a second sensor that detects a brightness of the light source, the second sensor consisting of a plurality of optical sensors at different distances from the light source, and each of respective distances from the light source to the respective optical sensors being longer than a distance from the light source to the first sensor, the method comprising: acquiring change degree information indicating respective predetermined change degrees of detection values from the respective optical sensors of the second sensor; acquiring the change degree of the detection value from any of the plurality of optical sensors during a period; correcting the change degree on the basis of the change degree information; and controlling the transmittance of the display panel on the basis of a difference between the corrected change degree and a change degree of a detection value from the first sensor during the period.
Method to control a display apparatus using a light source, display panel and two sets of brightness sensors. There is a first sensor, and the second sensor consisting of a group of sensors at different distances from the light source. The method corrects for variations in the multiple sensors in the second sensor, and then takes the difference between the first and corrected second sensors to correct the display.
15. A method of controlling a display apparatus including: a light source configured to emit light in a front direction; an optical member configured to diffuse a part of the light from the light source in a direction that is perpendicular to the front direction; a display panel configured to display an image by transmitting the light from the light source; a first sensor provided in neighbor of the light source to detect a brightness of the light source; and a second sensor to detect a brightness of the light source, a distance from the light source to the second sensor being longer than a distance from the light source to the first sensor; the method comprising: acquiring a degree of a degradation of the optical member on the basis of a detection value of the first sensor and a detection value of the second sensor, and controlling a transmittance of the display panel on the basis of the degree of the degradation of the optical member.
A method for controlling a display using a light source with a diffuser, a display panel, and two light sensors, one closer to the light source and one further. The method determines how degraded the diffuser is by comparing the sensor values, and adjusts the display panel's light transmittance accordingly to compensate.
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March 31, 2015
May 23, 2017
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